I'll give you a HINT.
The Big Bang Theory Season 7, Episode 6
Hint: it's a cube of a cube
of a prime.
The Big Bang Theory Season 12, Episode 23
I'll give you a HINT.
The Big Bang Theory Season 12, Episode 6
I'll give you a HINT.
The Big Bang Theory Season 1, Episode 6
Hint. Madame Curie had her husband
to help her.
The Big Bang Theory Season 3, Episode 7